The enhanced microwave broadband absorbing ability of carbon microspheres via electromagnetic simulating honeycomb desig
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The enhanced microwave broadband absorbing ability of carbon microspheres via electromagnetic simulating honeycomb design Ning Zhang1, Weihua Gu1, Yue Zhao1, Jing Zheng2,*, Chunchuan Pei3, Feiyue Fan3, and Guangbin Ji1,* 1
College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211100, People’s Republic of China 2 Department of Chemistry and Materials Science, College of Science, Nanjing Forestry University, Nanjing 210037, People’s Republic of China 3 Jiangsu Wanhua Tycho Materials Technology Co. Ltd, 15-5#, Tongzhan East Road, Huangqiao Town, Taixing 225411, People’s Republic of China
Received: 10 October 2020
ABSTRACT
Accepted: 27 October 2020
The electromagnetic simulation can be used to design the macroscopic absorbing structure of the microwave absorbing material. Research indicates that the macrostructure can adjust the impedance matching and electromagnetic properties of the materials, thereby improving the absorption performance. Among them, the honeycomb structure is often used in actual products due to its good absorption characteristics and mechanical properties. Therefore, in this work, the absorption performance of the carbon microsphere material was improved through the honeycomb structure design. The carbon microsphere material is firstly prepared by sintering phenolic resin, which has the advantages of convenient synthesis, high yield, and a narrow absorption bandwidth of 4.4 GHz. Then, through the high frequency structure simulator (HFSS) electromagnetic simulation, the honeycomb structure based on the carbon microspheres was macroscopically designed, achieving a larger 8.3 GHz absorption frequency bandwidth. This research completed the combination of electromagnetic simulation and honeycomb structure, improved the absorption bandwidth of carbon microspheres, and opened up a new way for the further improvement and practical application for traditional absorption materials.
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Springer Science+Business
Media, LLC, part of Springer Nature 2020
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https://doi.org/10.1007/s10854-020-04780-y
J Mater Sci: Mater Electron
1 Introduction With the rapid development of technology, the electromagnetic waves and electromagnetic pollution are in the process of continuous innovation and progress in electromagnetic wave communication network technology. Unfortunately, the accompanying products have an adverse effect on the normal operation of some electronic equipment, so the performance of the absorbing material is of great significance [1–3]. Traditional absorbing agents such as graphite [4, 5], conductive carbon black [6, 7], silicon nitride [8, 9], silicon carbide [10, 11], iron nitride [12, 13], ferrite [14, 15], ultrafine metal powder [16], carbonyl iron powder [17, 18], carbon-based composites [19–22] have been studied for many years. Among them, carbon-based materials with excellent and stable absorbing properties have long been recognized by researchers. Specifically, it is v
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